Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ade725f861ac385…

MALICIOUS

PDF

78.2 KB Created: 2021-06-15 13:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7cbd99ceba379f88ef31e7c2f7881c99 SHA-1: aa5df447e481cd2a9eb3852e4ca1f3d038ee0835 SHA-256: 0ade725f861ac385d20dc435f3fbe5e51a3b9a022736fa965b098c9723ff3f73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting and configured as a link farm, with one prominent URL leading to a site offering movie downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/pbw?utm_term=the+bounty+hunter+full+movie+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466680/normal_606ade1230376.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/23047d28782179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413976/normal_604f9154e5913.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370051/normal_5fca662be058e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477892/normal_60465ecf54f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_601cbf904a1c9.pdfIn PDF document text
    • https://pulipelese.weebly.com/uploads/1/3/4/6/134686308/tisumigetok-netoguronoxe-fawarepomurafux.pdfIn PDF document text
    • https://jejalonon.weebly.com/uploads/1/3/1/6/131636908/kenat.pdfIn PDF document text
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/4658717.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457008/normal_600252d213e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_601a5c013b116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mumasenekera.pbworks.com/w/file/fetch/144825342/digital_signal_processing_proakis_4.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/gogiboto.pdfIn PDF document text
    • http://zefuberiwuli.pbworks.com/w/file/fetch/145319298/dadojujovisidog.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144420123/piramuxudilawijomemom.pdfIn PDF document text
    • http://gatunam.pbworks.com/f/58237674378.pdfIn PDF document text
    • http://lalakabazu.pbworks.com/f/how_are_aluminum_clad_windows_made.pdfIn PDF document text
    • http://zanonot.pbworks.com/w/file/fetch/144903261/20299291076.pdfIn PDF document text
    • http://pijovaj.pbworks.com/w/file/fetch/145107267/the_red_book_download.pdfIn PDF document text
    • http://rubuxesi.pbworks.com/w/file/fetch/144923829/bee_gees_much_heaven.pdfIn PDF document text
    • http://wudapokot.pbworks.com/f/maths_subtraction_word_problems_for_class_3.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/145004721/genki_second_edition_workbook_answers.pdfIn PDF document text
    • http://zekapotog.pbworks.com/w/file/fetch/145117770/23865801434.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 4872 bytes
SHA-256: 914c5fe17f28ecdf9f997e5cf0bcd8255e79eaf3ce9740e5e87172ec7beb5c1f
font_01_sfnt_off00010584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10584 11148 bytes
SHA-256: 08aa300c7d9a8b2bafac49d0df2947cf6aa7fd26eaa776f8173308baeb74f2ca

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